My goal: have an SVG (fill: gradient) animated to change into a different gradient fill. All this should be done dynamically, using GSAP v3 (maybe using gsap.fromTo()?).   I can create the SVG dynamically. I can also create other elements like the <defs> and <stop> to go inside the gradient elements.   At this point, I can have the SVG display the 1st gradient dynamically. And I can animate other properties (like size, speed, or location). What I cannot do, howeve